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No. 455,542. Patented July 7,1891@ WMM/ease@ A S14/Wenko;

AWQ'T UNITED STATES PATENT OFFICE.

CHARLES Il?. EMERSON, SOMERVILLE, MASSACHUSETTS; GEORGE IV.

EMERSON (ADMINISTRATOR OF SAID CHARLES NV. EMERSON, DE- CEASED) ASSIGNOR OF ONE-HALF TO WALTER S. lVAlT, OF NEWTON,

MASSACHUSETTS.

HEAT|NG APPARATUS.

SPECIFICATION forming part of Letters Patent No. 455,542, dated July 7, 1891.

Application led April '7, 1890. Serial No. 346,880. (No model.)

ing, and in which such smoke or gas con? sumption is effected by the discharge of superheated air into the products ofthe primary combustion of the fuel in an auxiliary gas-consuming chamber. Y

My object is to increase the heating capacity and efficiency by effecting complete combustion of the gases and smoke by discharging superheated air into them, the air being heated by the primary heat of the gases, smoke, dac., and also by their combustion in an auxiliary combustion-chamber in the up-` per part of the primary combustion-chamber, and above the tire,'the heat being sui-licient to produce perfect combustion thereof.

My invention consists in the several novel features of construction and operation hereinafter described,` and which are specifically set forth ,in the claims hereto annexed Itis constructed as follows, reference being had to the accompanying drawings, in which- Figure 1 is a longitudinal vertical section of a stove embodying my invention. is alplan viewof thctop of the auxiliary combustion-chamber.

A is the combustion-chamber above the grate, 1, and 2, 3, and 4 are respectively the front, side, and rear walls of this chamber.

B is the auxiliary combustion-chamber, constructed of lire-brick 0r other non-combustible material, extending above the cham ber A and supported by the latter.

The chamber B is provided with a perforated bottom, so that the products ot' combustion are conducted into it from the combustion-chau1be1,and the gases are consumedl therein. The sides are also perforated, there being a space between the walls of the combustion-chamber and the said sides of the chamber B, so as to create an annular iue 10 around the chamber B and between it and the Walls of the body of the' heater, and 11 is A Fig. 2 y

. the top, of the same size as they base, but provided with a notched rim l2.

The gases, &c., enter the chamber B through the bottom perforations, comminglewith the hot air or steam discharged into it from thc air-pipe 13, open at its inner end and also provided with perforations 14 to aid in distributing the hot air more evenly, and in this chamber the hot air and gases unite and are therein consumed entirely, or substantially so, and the heated products ot' this combustion pass ont together th rough the perforations in thve'sides into the line A10, andthence through the notches in the rim l2 into the heating-chamber 5, and thence to the chimney through the pipe. A jacket 15 is used, creating ahot-ai r reservoir, whence the heat is conducted to any point desired, or, in the .case of a stove, is discharged directly into the room. The air-supply pipe 13 leads outward into the room or out of doors or all any other source of supply. 1 It is apparent that steam can be fed through this pipe into the chamber B.

What I claim isl. The combination, with the grate and lire-pot, of an auxiliary combustion-chamber supported above the fire-pot, having a perforated bottoln and sides, there being a line between the auxiliary chamber and the body of the heating apparatus, and an outlet-flue leading thence to the smoke-pipe, and an airinlet. pipe projecting into the auxiliary chamber.

2. The combination, with the grate and fire-pot, of an auxiliary combustion-chamber supported above the fire-pot, having a 'perforated bottom and sides and an outwardlyflanged top provided with apertures, there being a flue between the auxiliary chamber and the body of the heating apparatus, a heating-chamber above the auxiliary chamber receiving the products of combustion from the flue 10, an outlet-flue leading thence to the smoke-pipe, and an air-inlet pipe projecting into the auxiliary chamber.

In witnesswhereof I have hereunto set my hand this 13th day ot' March, 1890.

CHARLES IV. EMERSON. 

